@charset "utf-8";

@function px($px){
    @return (px/2);
}
$fontsize:40;
@function r($px){
    @return $px/$fontsize * 1rem;
}

.web{
    width: 100%;
    height: 100%;
    position: relative;
    header{
        width: 100%;
        height: 40px;
        position: absolute;
        top: 0;
        background: #f7f7f7;
        padding-bottom: 10px;
        .head1{
            float: left;
            height: 50px;
            width: r(40);
            margin-left: r(25);
            i{
                font-size: r(40);
                line-height: 50px;
                color: #8b8d8f;
            }
        }
        .head2{
            float: right;
            width: r(51);
            height: r(51);
            margin-right: r(30);
            margin-top: r(30);
            i{
                font-size: r(60);
                line-height: 23px;
                color: #8b8d8f;
            }
        }
        .head3{
            width: r(400);
            height: 100%;
            margin: 0 auto;
            margin-top: 6px;
            border-radius: 5px;
            p{
                font-size:r(45);
                text-align: center;
                line-height: r(90);
                font-weight: 700;
            }
        }
    }//header
    
    
}

section{
        width: 100%;
        position: absolute;
        top: 100px;
        background: yellow;
    }